Professor Dave Explains
IIT/JEE Chemistry Practice #1: Avogadro's Number/Moles
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Physics Girl
What is the MAGIC RUSSIAN DIAMOND?
In the early 2000s, physicist found a diamond they’d been searching for. Find out what it was used for.
Australian Broadcasting Corporation
Can Seaweed Save the World: Seaweed farms in the open ocean
Professor Tim Flannery investigates how seaweed is helping to save the world. From growing the foods of the future, helping clean polluted water and even combating climate change. Can seaweed farms grow at scale but way out in the open...
NASA
NASA | Earth from Orbit 2014
Every day of every year, NASA satellites provide useful data about our home planet, and along the way, some beautiful images as well. This video includes satellite images of Earth in 2014 from NASA and its partners as well as photos and...
Professor Dave Explains
Practice Problem: Synthesis Challenge
We've got a target molecule to synthesize, and we have to start from benzene and other reagents of three carbons or less. How are we gonna do this? Think about the reactions you know, especially some electrophilic aromatic substitution,...
Professor Dave Explains
Practice Problem: Retrosynthesis of an Alcohol
For this one we need to understand the key points of retrosynthetic analysis. What reactions make alcohols? How can we put this molecule together?
Professor Dave Explains
Practice Problem: Newman Projections and Nomenclature
For this one, we will need to be able to draw Newman projections as well as name the molecule using the rules of IUPAC nomenclature. Basic stuff!
Professor Dave Explains
Practice Problem: Empirical and Molecular Formulas
How do we know how many atoms of each element are in a particular compound? Through clever experiments! Here let's practice using percent mass information to get the empirical and molecular formulas of a particular compound.
Professor Dave Explains
Organic Chemistry Synthesis Challenge 5
Need some organic chemistry practice? Here's a tricky synthesis to try!
Professor Dave Explains
Organic Chemistry Synthesis Challenge 2
Need some organic chemistry practice? Here's a tricky synthesis to try!
Professor Dave Explains
Organic Chemistry Mechanism Challenge 7
Need some organic chemistry practice? Here's a tricky mechanism to try!
FuseSchool
The Functional Group Concept Explained
This is the introduction to the Functional Group concept - giving an oversight about Organic Chemistry, the composition of Alkenes.
The Guardian
The Climate and the Cross
An internal battle is simmering among US Christians over whether climate change is a call to protect the Earth, the work of God to be welcomed, or does not exist at all.
Curated Video
Cellular Respiration - Energy in a Cell
In this lecture, I talk about Cellular respiration, which consists of Glycolysis, the Krebs Cycle and the Electron Transport Chain. I deal with how Glucose is broken down and how ATP is made. Since energy is important for all living...
Catalyst University
Strong Reductions using Lithium Aluminum Hydride (LAH)
Strong Reductions using Lithium Aluminum Hydride (LAH)
Curated Video
Empirical Formula: Simplest Whole Number Ratio of Atoms in a Substance
The video explains the concept of empirical formula in chemistry. The video also talks about how to convert the molecular formula into the empirical formula and vice versa. The video presents examples of how to determine the empirical...
Professor Dave Explains
Lewis Dot Structures
Finally, you'll understand all those weird pictures of molecules with the letters and the lines and the dots! Those are lewis dot structures. Let's learn how to draw them. It's easier than you think.
Professor Dave Explains
Ugi Reaction
We just learned about the Passerini reaction, and now it's time to learn a similar one, the Ugi reaction. This is another multi-component reaction that is excellent for generating chemical libraries. To the components of the Passerini...
Healthcare Triage
Beef Isn't Great for the Environment
New studies indicate that beef is not really all that bad for your health, as long as you eat it in moderation. BUT, don't think you're off the hook yet. The production of beef turns out to have a lot of environmental downsides....